Furuno WN-701-W, Руководство пользователя

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8. Daily Maintenance
Daily maintenance is essential to keep the unit ready for operation at full performance.
Do maintenance from time to time as instructed below.
Housing
Gently wipe off dirt or stain from the housing by using soft cloth damped with a bit of
water.
CAUTION
Never use solvent such as thinner, benzene, toluene, acetone, etc., or
plastic body may melt, deform, whiten, etc.
When wiping the housing with damp cloth, squeeze out water well. If not,
metallic parts such as connector pins or switch contacts may deteriorate,
resulting in poor contact.
Connectors
If the unit is left in high-humidity or corrosive atmosphere for a long time, connectors
may be corroded, resulting in poor contact. To refresh the contacts, repeat plug-in
and out action several times. (Note that too many plug-in/out operations may waste
the contacts.)